Corrosion resistance of the welded AISI 316L after various surface treatments

Tatiana Liptáková, Monika Halamová, Ayman Alaskari

Abstract


The main aim of this work is to monitor the surface treatment impact on the corrosion resistance of the welded stainless steel AISI 316L to local corrosion forms. The excellent corrosion resistance of austenitic stainless steel is caused by the existence of stable, thin and well adhering passive layer which quality is strongly influenced by welding. Therefore surface treatment of stainless steel is very important with regard to its local corrosion susceptibility Surfaces of welded stainless steel were treated by various mechanical methods (grinding, garnet blasting). Surface properties were studied by SEM, corrosion resistance was evaluated after exposition tests in chlorides environment using weight and metalographic analysis. The experimental outcomes confirmed that the mechanical finishing has a significant effect on the corrosion behavior of welded stainless steel AISI 316L.


Keywords


Stainless steel AISI 316L, TIG welding, surface treatment, immersion test, corrosion resistance, light microscopy, electron microscopy

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References


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Copyright (c) 2014 Tatiana Liptáková, Monika Halamová, Ayman Alaskari

License URL: http://creativecommons.org/licenses/by-nc-nd/3.0/

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